Improvement in reflecting-lamps



PATENT @Prion i 'nutren STATES' EMIL BOESOH, OF SAN FRANCISCO,CALIFORNIA.

.IMPROVEMENT IN REFLECTlNG-LAMPS. l

Specification forming part of Letters Patent No. 149,712, dated April14, Y1874; application filed February 14, 1873.

To all whom 'it may'concern." l Be 1t known that I, EMIL Bonson, of SanFrancisco ci tyand county, State of California,

have invented an Improved Reflecting-Lantern; and I do hereby declarethe followin g description and accompanying drawings are suffiL cient toenable any person skilled in the art or science to which it most vnearlyappertains to make and use my said invention or improvei ment withoutfurther invention or experi.- inent. l

This improved lamp or lantern I shall call the `long-range duplicatereflector, its object being to provide a light Aof more than usualintensity, by which mills, mines, and like places can be properlylighted.

In mining and many other kinds of nightwork it is necessary to direct astrong light upon a particular spot where the workI is be ing carriedon, and in `hydraulic mining especially it is necessary to keep the lampor lantern at a considerable distance from this point, so as to protectit from the sliding or caving of the bank.' This lantern is intended tosupply this want; and in order to obtain the desired volume of light, mylantern is provided with twin lamps, and the reilector is provided withtwin focal reiiectors, so that a strong concentrated light will result.The intensity of the light may be increased by adding other lamps andcorresponding focal reflectors, as many as may be required.

Instead of constructing the focal reiiectors separate from the mainreiiector, so that they can be adjusted independently, as shown in myformer patent, No. 142,433, dated October 22, 1872, I secure the focalreflectors to the main reflector, and mount the main rellector A ontrunnions, so that the whole reiiecting apparatus may be directed asrequired, and thus carry the bodyof light to any point where it may berequired.

Besides the above advantages, my invention represents other improvementsof value.

In order to explain my invention so that others may be able tounderstand its construction and arrangement, reference ishad to thefollowing description and accompanying' drawings, in which- Figure 1 isa front view of my lantern. Fig. 2 is a sectional elevation. Fig. 3 is aplan view looking downward, with the top of the case out away on theline :v a" of Fig. 2.

A represents the body or case of my lamp or lantern. This case Imake ofay V shape, so

vthat when the reflector is in place 11o space tion. The reflector D ismade in any conveni ient form, being gradually drawn in toward the 'rearend by the parabolic curve given to its sides. E E are the twin focalreliectors, which are secured in the bottom or apex of the mainreflector, so as to provide a separate focus for each lamp employed 5 orthe reiiector may be formed in such a manner as to provide the desirednumber of focuses without using additional or focal reflectors. A11opening, d, is made in the lower part ofthe reli'ector D, wide enough toadmit the lamp-stand B, and another opening, d', is made in the roof ofthe reflector, through which the chimneys of the lamps pass. A lid orcover, c, is hinged to the outside upper rim of the reliector D, sothatwhen it is down it will cover the upper opening, d. The lower side ofthis cover has a reiiectingsurface, so that the entire upper portion ofthe reflector will be utilized, while the lampchilnneys can be insertedby simply raising the lid until they have been placed, when the lid willbe dropped so as to cover the opening. A plate, f, is secured to eachside of the case at the proper height, and on its -rear portion, inwhich trunnion-bearings are provided. The reflector D has a trunnion, g,on each side, so that it can be suspended fromvtheplates f, and whenthussuspended the lamp-stand B will project through the opening in the lowerpart of the reiiector. A quadrant-plate, h, is se cured to the underside of the reflector, in the circular edge of which a series of holesis made. This plate moves between two vertical plates below thelamp-stand, and when the reflector v is adjusted to the desired angle apin, z', is passed through one of the holes in the quadrant, so as toholdthereilector in place. Holes In the rear portion of the bottom aremade in the bottom of the lampcase and below the door at the front,through which air is admitted to supply the flame; and in order todirect the air which enters below the lampstand up through the openingin the lower part of the reflector, I secure a plate, j, at an angle inthe lower part of the lamp-stand, so that it will prevent the air frompassing out in front of the reilector. The air which thus en ters thereflector will, when heated, pass up through the opening in the upperpartof it, and thence through the chimneyto the outer air, and as thesupply will be const-ant the interor of the lamp cannot becomeoverheated. I have also discovered that by corrugating, or rather makingradial grooves in,"aJ focal reiiector, as shown, the light which itreiiects will be much subdued, so .that the eyes will not be strained bylooking at it, while at the same time the grooves do not impair thereilectin g powers of the reector, thus obviating one objection to j theuse of these reiiectors. The roof of the lamp is made in two parts, oneabove another, so as to provide a space for the heated air to pass out.The chimney or dome K has a cap, l, which slips down over it, beinglocked by a pin on the dome moving in a spiral groove in the cap, sothat atwisting motion is required to turn the cap down. Holes are madein the sides of the cap, through which the smoke passes to the outerair. By raising or lowering this cap, the draft through the lamp can beregulated, as required.

By this construction I provide a lamp of great power, and one which isespecially adapted for the purposes mentioned.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. The rclectorD, having the openings d d', the upper opening, d', beingprovided with a hinged sectional cover, e, which forms a part of thereflecting-surface when closed, substantially as above described.

2. The verticallyadjustable reflector D, with its trunnions g supportingside plates f, and having the quadrant attachment hand pin i, by whichthe reflector can be shifted and Xed in the desired position fordirecting the light, substantially as specified. 3. The lamp-stand B,open in front and having the inclined plate j, in combination with alamp-case having holes in its bottom, for the purpose described.

In witness whereof I hereunto set my hand and seal.

EMIL BOESCH. [L. s.] v- Witnesses:

JOHN L. BOONE, C. M. RICHARDSON.

